It is the start of the week and Marie, Willy and Silvie have three jobs to complete. The three of them can work on these jobs in any order. Job A requires 4 hours of Marie's time, 5 hours of Willy's time, and 3 hours of Silvie's time. Job B requires 2 hours of Marie's time, 8 hours of Willy's time, and 7 hours of Silvie's time. Job C requires 10 hours of Marie's time, 4 hours of Willy's time, and 5 hours of Silvie's time. Devise a schedule for Marie, Willy, and Sylvie that details when they will be working on each job. (Assume that they work 7 hours per day.) For the example above, what is the loading on Marie, Willy and Silvie? If all the jobs have to be finished within 2 days, how much extra time must each of them work